Iit depend in you if what is your goals. if you want to play just for pastime and dont care if you loose then i suggest go gambling but if you want to earn more profit and avoid loosing much then go trading. both of them are has a risk but gambling is more risky and usually dont recomended if your playing it to earn more profit
IMO, that is how it is in this forum.
Risk is equal to profit or loss.
The higher the risk the higher the profit. I dont think there is more riskier than gambling. Trading have some safety belts that could let you save some of your invested money.
The double your money service, I dont think they are real so erase that from the list. Thise are just scams.
Trade or gamble it is your choice.